"Time and space always change, but there is something which is eternal and changeless. For example, the world and time, past or future, nothing exists for us in sleep. But we exist. Let us try to find out that which is changeless and which always exists."
Ramana Maharshi was an Indian Hindu sage and spiritual teacher associated with Advaita Vedanta and self-inquiry practice. He lived at Arunachala in Tiruvannamalai, where his teachings attracted seekers from India and abroad.